My site www.cropinstop.com has a problem with the page layout that occurs when the mouse is hovered over an image on the product listing page.

For example, hover over the images on "Papers/Schooldays Paper" page. When the mouse is located over any image in the first row, the page drops down, the top half of the page is white space, and a medium size image of the product is displayed on the left end of the white space.